René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[MNT]: PolarTransform deprecation didn't warn","articleBody":"### Summary\n\nTaking a simplified version of the code from #31622 \n\n```python\nimport matplotlib.pyplot as plt\nimport numpy as np\n\nfrom matplotlib.projections import PolarAxes\nfrom matplotlib.transforms import Affine2D\nfrom mpl_toolkits.axisartist import GridHelperCurveLinear, HostAxes\n\n\nfig = plt.figure()\ntr = (\n    Affine2D().scale(np.pi / 180., 1.) +\n    PolarAxes.PolarTransform(apply_theta_transforms=False)\n)\ngrid_helper = GridHelperCurveLinear(tr)\nax1 = fig.add_subplot(axes_class=HostAxes, grid_helper=grid_helper)\n\n    \nplt.show()\n```\n\nWith v3.10.8 this runs with no warnings.  With `main` and the 3.11 release candidate this fails because we removed the _apply_theta_transforms_ parameter at #30004.  Since the deprecation warning hasn't been showing up, should we reinstate the parameter for another couple of versions?\n\n### Proposed fix\n\n_No response_","author":{"url":"https://github.com/rcomer","@type":"Person","name":"rcomer"},"datePublished":"2026-05-06T19:41:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/31624/matplotlib/issues/31624"}